Version Management of Composite Objects in CAD Databases.

@inproceedings{DBLP:conf/sigmod/AhmedN91,
  author    = {Rafi Ahmed and
               Shamkant B. Navathe},
  editor    = {James Clifford and
               Roger King},
  title     = {Version Management of Composite Objects in CAD Databases},
  booktitle = {Proceedings of the 1991 ACM SIGMOD International Conference on
               Management of Data, Denver, Colorado, May 29-31, 1991},
  publisher = {ACM Press},
  year      = {1991},
  pages     = {218-227},
  ee        = {http://doi.acm.org/10.1145/115790.115825, db/conf/sigmod/AhmedN91.html},
  crossref  = {DBLP:conf/sigmod/91},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

Abstract

There are essentially two characteristics of design objects, which impact upon the iterative and exploratory nature of the design process. First, they are hierarchically formed assemblies of component objects. Second, they go through phases of design giving rise to multiple versions. This paper addresses a broad spectrum of modeling and operational approaches related to these two aspects in computer-aided design databases.

A classification of composite object attributes into intrinsic interface attributes and nonintrinsic internal assembly attributes provides an insight into their behavior and functionality. The design process is studied with respect to these classes of attributes. A design evolves in discrete states through mutation and derivation and may cause version proliferation. A notion of version equivalence, based on invariant attributes and value-acquisition, is used to prevent version proliferation. States of versions, which determine their updatability, and operations on these states are described. A methodology for version management at the type and instance levels and solutions for the related problems are presented.

Copyright © 1991 by the ACM, Inc., used by permission. Permission to make digital or hard copies is granted provided that copies are not made or distributed for profit or direct commercial advantage, and that copies show this notice on the first page or initial screen of a display along with the full citation.

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